<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>1_字符串形式的ref</title>
</head>
<body>
        <!-- 准备好一个“容器” -->
	<div id="test"></div>
	
	<!-- 引入react核心库 -->
	<script type="text/javascript" src="../js/react.development.js"></script>
	<!-- 引入react-dom，用于支持react操作DOM -->
	<script type="text/javascript" src="../js/react-dom.development.js"></script>
	<!-- 引入babel，用于将jsx转为js -->
	<script type="text/javascript" src="../js/babel.min.js"></script>
    <!-- 引入prop-types，用于对组件标签属性进行限制 -->
	<script type="text/javascript" src="../js/prop-types.js"></script>
    <script type="text/babel">
        // 创建组件
        class Demo extends React.Component{
            showData=()=>{
                // console.log(this.refs)
                // 通过 refs 来拿到input 的DOM
                const {input1}=this.refs
                // console.log(input1.value)
                alert(input1.value)
            }

            showData2=()=>{
                const {input2}=this.refs
                alert(input2.value)
            }
            render(){
                // onBlur 表示的是失去焦点的 回调 
                return <div>
                        <input ref="input1" type="text"  placeholder="点击按钮提示数据"/>&nbsp;
                        <button onClick={this.showData}>点我提示左侧的数据</button>&nbsp;
                        
                        <input ref="input2" type="text"  onBlur={this.showData2} placeholder="失去焦点提示数据"/>
                    </div>
            }
        }

        ReactDOM.render(<Demo />,document.getElementById('test'))
    </script>
</body>
</html>